Cooper said: "I'd like to thank Vernon and Reggie, who have both been excellent ambassadors for Radio 1 and Radio 1Xtra during their ten years with us. I wish them all the very best.

"I'm excited by our brand new shows, which will appeal to the smartphone generation, with our audience able to listen, watch and share Radio 1's great content."

Jamil's switch to the Sunday afternoon chart marks a rapid rise for the presenter who currently hosts the Sunday evening request show and only joined the station earlier this year. She previously presented shows on Channel 4's T4 and E4.

The new schedule changes will come into effect in the new year.

Kay said: "I've had an incredible nine and a half years at Radio 1 that has exceeded all of my expectations. It has been a fabulous experience and I've loved the weekends I have spent with my listeners.

"However, when I was offered a contract extension I thought long and hard, but after 12 years of working weekends with CBBC, T4 and Radio 1, I felt it was the right time to leave as the girls are now both in school so weekends are more precious than ever."

Yates said: "I have absolutely loved my time hosting the chart show.

"It's been a privilege to deliver to the nation the weekly number one song, but after 10 years at Radio 1/1Xtra I am looking forward to focusing on other projects and new challenges."

The Radio 1 chart show began life on 1 October 1967 when it was known as Pick of the Pops and hosted by Alan Freeman.

• To contact the MediaGuardian news desk email editor@mediatheguardian.com or phone 020 3353 3857. For all other inquiries please call the main Guardian switchboard on 020 3353 2000. If you are writing a comment for publication, please mark clearly "for publication".

• To get the latest media news to your desktop or mobile, follow MediaGuardian on Twitter and Facebook